MAPI and managed code experiences?

Using MAPI functions from within managed code is officially unsupported. Apparently, MAPI uses its own memory management and it crashes and burns within managed code (see here and here)

All I want to do is launch the default e-mail client with subject, body, AND one or more attachments.

So I've been looking into MAPISendDocuments and it seems to work. But I haven't been able to gather courage to actually use the function in production code.

Has anybody used this function a lot? Do you have any horror stories?

PS. No, I won't shellExecute Outlook.exe with command line arguments for attachments.

PPS. Attachment support is a requirement , so Mailto: solutions do not cut it for me.